Difference: 20161021_MSciSpectroscopyMeeting (1 vs. 5)

Revision 521 Oct 2016 - WilliamBurrows

Line: 1 to 1
 
META TOPICPARENT name="StewartBoogertSpectroscopy2016"
  • Predominantly experimental week; took spectrum images for 4 remaining lamps
Added:
>
>
  • Started aligning mirrors and focusing laser onto fibre end
 Peak Finder
  • Plot of differential of data for Cadmium lamp with the grating of 6.50mm:
    diff.png
Line: 12 to 13
 
  • Test of peak finder algorithm:
    peakfinder.png
Deleted:
<
<
 
  • Need to find the weighted average for the location of the peaks for each batch of peak lines; so instead of obtaining multiple vertical lines for each peak in data you obtain one which is the average of group of data at the location. Also need to find the width of data.
Deleted:
<
<
 Gaussian Fits
Changed:
<
<
  • Attempted to fit multiple Gaussian curves to a spectrum using peak features attained by eye, looking at the spectrums, in the form [amplitude, pixel position, width, background]
>
>
  • Attempted to fit multiple Gaussian curves to a spectrum using peak parameters attained by eye, looking at the spectrums, in the form [amplitude, pixel position, width, background]
 
  • Gaussian fits to the Cadmium 6.50mm spectrum:
    Cd_0650_Gaussians.png
Changed:
<
<
  • Peak values passed to the function were [8E6, 150, 30, 3E5], [1.6E7, 270, 30, 3E5], [1.6E7, 520, 30, 3E5]
>
>
  • Peak guess parameters passed to the function were [8E6, 150, 30, 3E5], [1.6E7, 270, 30, 3E5], [1.6E7, 520, 30, 3E5]
 
  • Gaussian fits to the Cadmium 1.50mm spectrum:
    Cd_0150_Gaussians.png
Changed:
<
<
  • Peak values passed to the function were [8E5, 20, 40, 6E5], [8E5, 75, 20, 6E5], [2E6, 150, 30, 6E5], [1.6E6, 190, 30, 6E5], [9E5, 200, 30, 6E5], [1E6, 310, 20, 6E5], [1E6, 320, 30, 6E5], [1.6E6, 470, 20, 6E5], [1E6, 560, 30, 6E5], [8E5, 750, 30, 6E5]
>
>
  • Peak guess parameters passed to the function were [8E5, 20, 40, 6E5], [8E5, 75, 20, 6E5], [2E6, 150, 30, 6E5], [1.6E6, 190, 30, 6E5], [9E5, 200, 30, 6E5], [1E6, 310, 20, 6E5], [1E6, 320, 30, 6E5], [1.6E6, 470, 20, 6E5], [1E6, 560, 30, 6E5], [8E5, 750, 30, 6E5]
 
  • Struggles with small, duplets or closely packed peaks

Added:
>
>
  • Limited Gaussian fits to the Cadmium 1.50mm spectrum:
    Cd_0150_Gaussians_2.png
  • Range for each fit is +/- 30 pixels from pixel position passed to the function
 -- WillBurrows - 20 Oct 2016

META FILEATTACHMENT attachment="Cd_0650_Gaussians.png" attr="" comment="Gaussian fits to the Cadmium 6.50mm spectrum" date="1476996987" name="Cd_0650_Gaussians.png" path="Cd_0650_Gaussians.png" size="40863" user="zyvb951" version="1"
Line: 37 to 41
 
META FILEATTACHMENT attachment="mdatadiff.png" attr="" comment="Normalised plot" date="1477006485" name="mdatadiff.png" path="mdatadiff.png" size="78832" user="zyvb137" version="1"
META FILEATTACHMENT attachment="allnor.png" attr="" comment="Normalised plot of all 3 sets of data" date="1477006514" name="allnor.png" path="allnor.png" size="102548" user="zyvb137" version="1"
META FILEATTACHMENT attachment="peakfinder.png" attr="" comment="Test of peak finder algorithm" date="1477006543" name="peakfinder.png" path="peakfinder.png" size="61151" user="zyvb137" version="1"
Added:
>
>
META FILEATTACHMENT attachment="Cd_0150_Gaussians_2.png" attr="" comment="Limited Gaussian fits to the Cadmium 1.50mm spectrum" date="1477052446" name="Cd_0150_Gaussians_2.png" path="Cd_0150_Gaussians_2.png" size="66747" user="zyvb951" version="1"

Revision 421 Oct 2016 - WilliamBurrows

Line: 1 to 1
 
META TOPICPARENT name="StewartBoogertSpectroscopy2016"
  • Predominantly experimental week; took spectrum images for 4 remaining lamps
Changed:
<
<
Peak finder, Locator
  • Plot of differential of data for cadmium lamp with the grating of 6.5mm:
    diff.png
>
>
Peak Finder
  • Plot of differential of data for Cadmium lamp with the grating of 6.50mm:
    diff.png
 
Changed:
<
<
  • Plot of second differential of data for cadmium lamp with grating of 6.5mm:
    doublediff.png
>
>
  • Plot of second differential of data for Cadmium lamp with grating of 6.50mm:
    doublediff.png
 
  • Normalised plot:
    mdatadiff.png

  • Normalised plot of all 3 sets of data:
    allnor.png

  • Test of peak finder algorithm:
    peakfinder.png
Changed:
<
<
* Need to find the weighted avera for the location of the peaks for each batch of peak lines. So instead of obtaining multiple vertical lines for each peak in data you obtain 1 which is the average of group of data at the location. Also need to find the Width of data.
>
>

  • Need to find the weighted average for the location of the peaks for each batch of peak lines; so instead of obtaining multiple vertical lines for each peak in data you obtain one which is the average of group of data at the location. Also need to find the width of data.
  Gaussian Fits

Revision 321 Oct 2016 - JamesAngthopo

Line: 1 to 1
 
META TOPICPARENT name="StewartBoogertSpectroscopy2016"
  • Predominantly experimental week; took spectrum images for 4 remaining lamps
Added:
>
>
Peak finder, Locator
  • Plot of differential of data for cadmium lamp with the grating of 6.5mm:
    diff.png

  • Plot of second differential of data for cadmium lamp with grating of 6.5mm:
    doublediff.png

  • Normalised plot:
    mdatadiff.png

  • Normalised plot of all 3 sets of data:
    allnor.png

  • Test of peak finder algorithm:
    peakfinder.png
* Need to find the weighted avera for the location of the peaks for each batch of peak lines. So instead of obtaining multiple vertical lines for each peak in data you obtain 1 which is the average of group of data at the location. Also need to find the Width of data.
 Gaussian Fits

  • Attempted to fit multiple Gaussian curves to a spectrum using peak features attained by eye, looking at the spectrums, in the form [amplitude, pixel position, width, background]
Line: 20 to 30
 
META FILEATTACHMENT attachment="Cd_0650_Gaussians.png" attr="" comment="Gaussian fits to the Cadmium 6.50mm spectrum" date="1476996987" name="Cd_0650_Gaussians.png" path="Cd_0650_Gaussians.png" size="40863" user="zyvb951" version="1"
META FILEATTACHMENT attachment="Cd_0150_Gaussians.png" attr="" comment="Gaussian fits to the Cadmium 1.50mm spectrum" date="1476997014" name="Cd_0150_Gaussians.png" path="Cd_0150_Gaussians.png" size="67055" user="zyvb951" version="1"
META FILEATTACHMENT attachment="gaussian_fit.py.txt" attr="" comment="Current Gaussian fit python code" date="1476997563" name="gaussian_fit.py.txt" path="gaussian_fit.py.txt" size="1666" user="zyvb951" version="1"
Added:
>
>
META FILEATTACHMENT attachment="diff.png" attr="" comment="Plot of differential of data" date="1477006385" name="diff.png" path="diff.png" size="57061" user="zyvb137" version="1"
META FILEATTACHMENT attachment="doublediff.png" attr="" comment="Plot of second differential of data" date="1477006448" name="doublediff.png" path="doublediff.png" size="63775" user="zyvb137" version="1"
META FILEATTACHMENT attachment="mdatadiff.png" attr="" comment="Normalised plot" date="1477006485" name="mdatadiff.png" path="mdatadiff.png" size="78832" user="zyvb137" version="1"
META FILEATTACHMENT attachment="allnor.png" attr="" comment="Normalised plot of all 3 sets of data" date="1477006514" name="allnor.png" path="allnor.png" size="102548" user="zyvb137" version="1"
META FILEATTACHMENT attachment="peakfinder.png" attr="" comment="Test of peak finder algorithm" date="1477006543" name="peakfinder.png" path="peakfinder.png" size="61151" user="zyvb137" version="1"

Revision 220 Oct 2016 - WilliamBurrows

Line: 1 to 1
 
META TOPICPARENT name="StewartBoogertSpectroscopy2016"
  • Predominantly experimental week; took spectrum images for 4 remaining lamps
Added:
>
>
Gaussian Fits

  • Attempted to fit multiple Gaussian curves to a spectrum using peak features attained by eye, looking at the spectrums, in the form [amplitude, pixel position, width, background]

  • Gaussian fits to the Cadmium 6.50mm spectrum:
    Cd_0650_Gaussians.png
  • Peak values passed to the function were [8E6, 150, 30, 3E5], [1.6E7, 270, 30, 3E5], [1.6E7, 520, 30, 3E5]

  • Gaussian fits to the Cadmium 1.50mm spectrum:
    Cd_0150_Gaussians.png
  • Peak values passed to the function were [8E5, 20, 40, 6E5], [8E5, 75, 20, 6E5], [2E6, 150, 30, 6E5], [1.6E6, 190, 30, 6E5], [9E5, 200, 30, 6E5], [1E6, 310, 20, 6E5], [1E6, 320, 30, 6E5], [1.6E6, 470, 20, 6E5], [1E6, 560, 30, 6E5], [8E5, 750, 30, 6E5]
  • Struggles with small, duplets or closely packed peaks

  -- WillBurrows - 20 Oct 2016 \ No newline at end of file
Added:
>
>
META FILEATTACHMENT attachment="Cd_0650_Gaussians.png" attr="" comment="Gaussian fits to the Cadmium 6.50mm spectrum" date="1476996987" name="Cd_0650_Gaussians.png" path="Cd_0650_Gaussians.png" size="40863" user="zyvb951" version="1"
META FILEATTACHMENT attachment="Cd_0150_Gaussians.png" attr="" comment="Gaussian fits to the Cadmium 1.50mm spectrum" date="1476997014" name="Cd_0150_Gaussians.png" path="Cd_0150_Gaussians.png" size="67055" user="zyvb951" version="1"
META FILEATTACHMENT attachment="gaussian_fit.py.txt" attr="" comment="Current Gaussian fit python code" date="1476997563" name="gaussian_fit.py.txt" path="gaussian_fit.py.txt" size="1666" user="zyvb951" version="1"

Revision 120 Oct 2016 - WilliamBurrows

Line: 1 to 1
Added:
>
>
META TOPICPARENT name="StewartBoogertSpectroscopy2016"
  • Predominantly experimental week; took spectrum images for 4 remaining lamps

-- WillBurrows - 20 Oct 2016

 
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